CSO: 9 cloud and on-premises email security suites compared
Mimecast Email Security
Mimecast is another vendor that has been around for many years. Its cloud-only email security will protect only other cloud-based email services. While it doesn’t have a Linux client, all other clients are supported. It also offers comprehensive features such as email archiving, DLP and browser isolation from invading malware.
Mimecast has several different plans, the least expensive is the Basic Perimeter plan that starts at $3 per user per month. The higher-priced plans include features such as a DMARC analyzer, phishing awareness training, and additional protective features.